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From: "Shimell, David (shimell)" <shimell@se*.co*>
To: "Sean T. Stevenson" <ststev@un*.co*>, techdiver@aquanaut.com
Subject: RE: decompresion gas selection and procedures
Date: Fri, 10 Dec 1999 02:20:05 -0800
Sean

On what profiles are you using these deco gasses, and what deco are you
doing.  I ask as I am wanting to be persuaded on the cost/benefit return on
the *majority* of the dives I do (say, 80m/265' for 21 minutes ABT).

David Shimell
Email: shimell@se*.co* <mailto:shimell@se*.co*> 
Project Manager, IBM NUMA-Q, Sequent Computer Systems Limited,
Weybridge Business Park, Addlestone Road, Weybridge, Surrey, KT15 2UF, UK
registered in England and Wales under company number: 1999363, registered
office as above

-----Original Message-----
From:	Sean T. Stevenson [SMTP:ststev@un*.co*]
Sent:	Friday, December 10, 1999 12:35 AM
To:	techdiver@aquanaut.com
Subject:	Re: decompresion gas selection and procedures

Because anecdotal evidence of the effects of adding helium to
decompression gases is sparse, I took the middle road.  Bill Mee is
apparently using heliox for everything, while George has not switched
to He in the 70 foot gas.  I split the difference, and use 35/32.5 and
50/25.  This appears to be working well.  I will wait for further
information to see if bumping up the He content is necessary.

-Sean




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